Holosun HE512T in detail

Holosun 512T is a full sized red dot from Holosun designed for long gun such as PCC, carbines or shotguns. In this article we cover details of this red dot. It is not review as such, instead we put all valuable information into this post so that you can decide yourself whether this optic device will work for you or not.

Mounting compatibility

Holosun 512T has a unique footprint that is to be used foremostly with its picatinny mounting interface, which is part of the package.

TYou will be therefore able to mount the red dot on any gun equipped with picatinny base or weaver base.


Holosun 512T is very robust and sturdy red dot designed to work on long guns. Compared to 510C, this sight is slightly thinner.

However, compared to Holosun 510C, this red dot is almost twice as heavy with 9.17 oz. This difference in weight is caused foremostly by the titanium body of Holosun 512T. The difference is that Holosun 510C has only titanium hood.

The dimensions of the red dot are following:

Length: 85mm / 3.35 in
Width: 42mm / 1.66 in
Height: 58mm / 2.27 in
Weight: 260g / 9.17 oz

The dimensions of the red dot window are the same as for 510C:

Width: 32mm / 1.26 in
Height: 23mm / 0.91 in


You can download here the Holosun 512T guide.

Frequently asked questions

You may be looking for answers to one of these questions. For each find the answer below.

What footprint is the Holosun 512T?

Holosun 512T uses unique footprint that does not fit any of the other footprint standards. Mounting device for picatinny base is part of the package.

How to turn on Holosun 512T?

Press and release either the “+” or “-” button in order to turn the red dot on.

How to turn off Holosun 512T?

Press the “+” and “-” button at the same time in order to turn the red dot off.

How to change reticle on Holosun 512T?

Press and hold the “-” button for 3 seconds in order to change the reticle.

How to adjust Holosun 512T?

To adjust height you have to use the elevation screw on top of the tail of the red dot.

To adjust side you have to use the windage screw on the right side of the housing of the red dot.

How to change battery in Holosun 512T?

Unscrew the screw on the right side of the red dot that holds the battery cover.

Subsequently remove the cover to approach the battery of the red dot.

The battery is CR2032.

Technical data

Reticle 2 MOA Dot & 65 MOA Circle
Light Wavelength 650nm
Reticle Color Red
Parallax Free Yes
Unlimited Eye Relief Yes
Magnification 1x
Multi-Coatings Yes
Power Source Battery & Solar
Battery Type CR2032
Battery Life (Hours) 50000
Brightness Setting 10 DL&2 NV
Window Size 0.91×1.26
Dimension (in) 3.35×1.63×1.7
Weight (oz) 9.17
Housing Material Titanium
Surface Finish Titanium
Adjustment per Click 0.5 MOA
W&E Travel Range ±50 MOA
Storage Temperature -40℃~70℃
Working Temperature -30℃~60℃
Submersion IPX8
Vibration 1000G


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